Sorry to hear you were sick. Come on down to Florida. The Chamber of Commerce doesn't allow snow birds to get sick!
The valve is getting weak and needs to be replaced. It will continue to pour water out the fill connection until the valve closes. Right now it is an irritant to you. Soon it will not close at all. That's what happened to me.
As a temp solution you can get a very short piece of drinking water hose (CW sells them, only a foot or two long) On the female end you can buy or make a plug with PVC parts. If the valve does not close, you can always connect the male end to the coach fitting. Or you can do what Nathan posted.